Physics
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phdt.......180b&link_type=abstract
Thesis (PH.D.)--UNIVERSITY OF CALIFORNIA, SAN DIEGO, 1990.Source: Dissertation Abstracts International, Volume: 51-11, Section:
Physics
Scientific paper
The results of a recent magnetic monopole search are presented. The detector is an array of He-Ch _4 proportional tubes whose effective area -solid angle product is 265 m^2sr. Possible monopole signatures are based upon signal timing and an atomic induction energy loss mechanism. For a live-time of 578 days, no bare monopole candidates were observed, setting an upper flux limit (at the 90% confidence level) of 1.8 times 10^{ -14} cm^{-2}sr ^{-1}rm s^{-1 } for beta > 1.1 times 10^ {-4}. In addition, preliminary results of a feasibility study on a possible WIMP (weakly interacting massive particle) detector are presented. The proposed instrument is a low pressure TPC (time projection chamber), and would detect WIMPs in the dark galactic halo by observing the energy and direction of nuclear recoil induced by the elastic scattering of a WIMP off a nucleus of the detector gas.
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